Concentrating apparatus



(No Model.) 3 Sheets-Sheet 1, J. K. HALLOWELL. GONGENTRATING APPARATUS.

No. 447,029. Patented Feb; 24, 1891.

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J. K. HALLOWELL. OONGENTRATING APPARATUS.

No. 447,029. Patented Feb. 24, 1891.

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(No Model.) 3 Sheets-Sheet 3. J K. HALLOWELL.

V GONGENTRATING APPARATUS.

No. 447,029. Patented Feb. 24, 1891.

777 Z 0 o O Q 0 UNITED STATES ATENT. FFICE.

JOHN K. HALLOIVELL, OF CAMDEN, NEV JERSEY.

CONCENTRATING APPARATUS.

. SPECIFICATION forming part of Letters Patent No. 447,029, dated February 24., 1891.

Application file-d June 14, 1888- Serial No. 277,132- (No model.)

To (all whom it may concern:

Be it known that I, JOHN K. HALLOWELL, a citizen of the Uni ted States, and a resident of Camden, in the county of Camden and State of New Jersey, have invented. certain new and useful Improvements in Concentrating Apparatus, of which the following is a specification.

My invention relates to an improvement in the class of apparatus for concentrating or sizing t-riturable material reduced to a ground or pulverized state; and it relates particularly to an improvement in apparatus of the aforesaid class whereby it shall be especially adapted to the dry concentration of the values in low-grade ores previously reduced to a proper degree of fineness.

The object of my improvement is to provide a concentrator of simple, durable, and comparatively inexpensive construction, and by means of which. any desired number of sizings of which the material is susceptible may be produced by a single operation.

To these ends my invention consists in the general construction of my improved apparatus; and it also consistsin details ofconstruction and combinations of parts.

In the accompanying drawings, Figure 1 shows lnyimproved apparatus in side elevation. Fig. 2 is an end view of the same; Fig. 3, a view in longitudinal sectional elevation of one of the several sixnilarly-constructed screens; Fig. 3, a partly broken and sectional top plan View of the same, with the sheet-iron most of a perpendicularly disposed series of screens, the mesh of the members of which decreases in size toward thelowermost of the series, which should be of the finest mesh.

with uprights, between which the screens extend, and which are pivotally supported to enable them to be rocked to agitate the material and thereby effect its separation into the several degrees of fineness of Which the com minuted massis composed, and according to the number employed of screens of different mesh. As the material is sifted, the residue, or that of too coarse a degree of trituration to pass through ascreen, is automatically discharged therefrom.

Following is a detailed description of my improved apparatus:

The frame is a light structure formed of uprights A A, preferablysections of gas-pipe, connected at their upper ends by a cross-bar A, also formed, by preference, of gas-pipe. At their lower ends the uprights A are pivotally supported in suitable bearings B. On the uprights arearms F, the number of which on each upright should correspond with the number of screens employed, and which are supported by the arms, the latter extending transversely of the uprights and being adjustable to different heights thereon, and susversely of the upright near its base and permitted to rest against one of the said stops to prevent toppling of the frame when disconnected from the driving-shaft D, hereinafter described.

The screens may be provided in any desired number, depending upon their dimensions and degrees of inclination and the capacity (length) of the uprights to accommodate them. I show three screens G, H, and I, all of which involve the same, or substantially the same, construction. Hence a description of the construction of one will explain that of each, slight differences being pointed out where they occur.

A- rectangular frame m has stretchedover its under side a sheet of woven wire Z, the mesh of which on the uppermost screen is largest, and becomes finer and finer in the order of location of the screens in the series in which they are supported. At one end the frame carries on the screen a plate 0, preferably-ofmetal. and at its opposite end another plate 0', having sides 7e, converging toward the extremity of the screen and terminating in a spout i, projecting beyond the end of the screen. here the mesh of the screen is sufficiently fine to render its re-enforcement desirable, it should be strengthened with supporting-wires r, as indicated in Fig. 3. On the under side of the frame and extending longitudinally between its extremities is secured the bottom U, Fig. 4, the base u of which is of the width of the frame at the end thereof where it is secured to it, and slants thencein a downward direction toward the opposite end of the frame, tapering laterally, as shown,to its extremity. Converging sides to extend from the sides of the frame m to meet and conform to the tapering edges of the'base ti, and they are joined at their extremities :by an end piece 10 properly conforming. At the lowest point of the junction of the parts u, u, and u is a flanged opening 1: for the discharge of material. The base U is thus substantially synclinal in form, or trough-shaped. The upper side of the frame should be completely covered by a plate h, having ani nlet-opening h atthe end provided with :the plate 0.

Theseveral screens are extended one below the other bet-ween the sides of the-oscillatoryframe, resting at their opposite ends or otherwise flexibly adjusted on the arms F, providedon the uprights A, and which arms are so adjusted in pairs on the uprights with the members of the pairs on different planes as .tocause the frame or of the uppermost screen G to slant in one direction,thatof the screen H next below it to slant in the -opposite direction, and that of the next lower screen 1 'to slant with theuppermost one. If the series of screensbe extended, the arrangement of their relatively slanting positions, whereby theyareeaused to slantsuccessi-vely in opposite directions,'is continued. For the purposes of my description, however, the explanation of my invention may be confined-to the employment of the three screens illustrated in Fig. 1, it being understood that the number-may be changed (increased or even decreased) Without thereby departing from my invention.

In setting the several screens the end of the uppermost provided with the dischargeopening 463 should coincide with the end of the next lower having the opening 7). in its plate h, while the opposite end of the latter having the discharge opening a coincides with the opening in the plate 7z, covering the lowermost screen. The screens are caused to inter-communicate by means of flexible (as canvas) connections 9 from the lower end .of the screen G to the uppermost end of the screen H, and from the lowermost end of the latter to the uppermost end of the screen I.

Astanfd-pipe N-(or any other suitable form of receptacle) is located adjacent to the standard A, beyond which the spouts i of the screens (1 and I project, and the spouts extend over hopper-shaped inlets i on the stand-pipe. The screen H likewise communicates with the lowermost stand-pipe inlet '2', the comm unication being produced by a pipe or chutef, extending from the spout 1' of the middle screen to the said inlet 71.

D is a crank-shaft supported in suitable bearings above the oscillatory screen-supporting frame, and linked by connectingrods 0 from the crank-pins e at its opposite ends to studs (1, near opposite ends of the cross-bar A of the frame, and on the shaft D is a driving-pulleyE,to be properly geared to the driving power. (Not shown.)

A hopper L is supported (preferably by suspension, as indicated) to coincide at its outlet with the opening h in the coveringplate h of the screen G, and is connected therewith by a flexible (canvas) connection 9. As shown in Fig. 2,the connection is represented as bifurcated, when the opening 'h should be adapted to receive both, or there may be two such openings. This feature, however, is of no material importance.

The operation is as follows: The pulverized material tobe separated is fed to the hopper L, impinging on theend plate@ of the screen 7 G, where its impact does no injury, as it might if exerted against the wire mesh. During the feeding the crank-shaft- D is actuated, thereby rapidly rocking the uprights A back and forth on their pivotal bases and thus also imparting to the screens an oscillatory undulating motion, which agitates the material, causing the mesh of thefirst. screen to sift into the bottom U thereof in spreading over the surface by the motion and inclination of the screen. -As the unsifted remnant of the material reaches the spout 'i it discharges into the uppermost inlet-opening v," in the standpipe. The sifted material is by the same action passed through the spoutu of the screen G upon the plate 0 of the next lower screen H, sifting through the finer mesh thereof and discharging the coarser remnant, or thatportion which is too coarse to pass through the mesh, into the stand-pipe at its lower inlet 1''. through the chute f, and discharging the sifted portion from the bottom U-of the screen I I, through its spout a upon the plate 0 of the lowest screen I, whence it is worked by the motion of the apparatus down the finer wiremesh thereof, sifting through the latter the particles sufficiently fine to pass through it, and which discharge from the spout u? of the last screen as a highly-concentrated product, a suitable receptacle (not shown) being there provided to receive the discharge, the coarser remnant discharging into the lower inlet t" of the stand-pipe N. As will thus be seen, the apparatus,-while utterly simple in construction, is very effective in its operation, since by a continuous action two, three, or

more sizings of the some triturated material may readily and rapidly be produced through inclosed screens, the number of which, and consequently of the sizings, may be provided according to requirement.

It will be noticed that inasmuch as the uprights A are oscillated through the arcs of circles the greatest strain is exerted upon the uppermost screen, owing to the greater weight of the material fed to it and to the greater extent of its motion and agitation upon it of the material. Hence it is formed the stronger, and the proportion of strength of structure of the screens to the wear upon it underthe conditions named is observed throughout the series of screens, thereby enhancing the durability of the apparatus.

Obviously not only may the number of screens on the single frame be increased, but a number of the frames, each carrying any desired number of screens, may be simultaneously actuated by linking them together and thus connecting them all with the same d ri vi ng-shaft, thereby materially economizin g in shafting and the like in the use of' my apparatus for a large sizing or concentrating plant.

hat I claim as new, and desire to secure by Letters Patent, is

1. In a concentrating apparatus, the combination of a rocking frame formed with uprightsA,pivotallysupported at theirbases and each provided with supporting-arms F, and intercom municating covered screens-adapted to discharge from their ends and supported to extend one above the other lengthwise between the uprights on the arms F, to be rocked laterally in the planes of the arcs described by the rocking uprights, and inclining successively in opposite directions, substantially as described. a

2. In a concentrating apparatus, the combination of a rocking frame comprising uprights A, pivotally supported at their bases and connected together toward their upper ends, a crank-shaft D, connected with the frame and provided with means for connectin g it with the driving-power, supporting-arms F, and stop-arms J on the uprights, stops K at the bases of the uprights for thearms J and intercom m unicating in closed screens supported to extend between the uprights on the arms F and inclining successively in opposite direct-ions, substantially as described.

3. In a concentrating apparatus, the combination of a rocking frame support ng screens one above the other and incllnlng successively in opposite directions, and each formed with a frame m, having woven wire Z stretched upon it and provided With a substantially synclinal or trough-shaped incllned bottom U, having an outlet 11 a plate 0 at one end of the screen, and a plate 0" at the opposite end terminating in a spout z, and a cover h, having an inlet-opening h, substantially as described.

4. A concentrating apparatus comprising, in combination, a frame formed of uprights A, pivotally supported at their bases and sustained against falling and connected together toward theirupper ends, arms F, ad ust-ably supported on the uprights, a crank-shaft D, connected with the said frame and provided with means for gearing it to the drivingpower, a receptacle N, screens G H I, supported on the arms to extend lengthwise between the uprights, one below the other, and inclined successively in opposite directions, and to be rocked laterally in the plane of the arcs described by the rocking uprights, and each comprising a frame m, having woven wire Z stretched upon it, increasing in the fineness of its mesh from the uppermost to the lowermost screen, a substantially synclinal or trough-shaped slanting bottom U, having an outlet 1L3, a plate 0 at one end and a plate 0 at its opposite end terminating in a spout 1', leading into the said receptacle,'and a cover h, provided with an inlet-opening h, flexible conduits g, respectively connecting the screen G from its outlet u with the screen H at the opening h in its cover and the screen H from its outlet 10 with the screen I at the opening h in its cover, and a hopper L, flexibly connected with the uppermost screen at its opening it, the Whole being constructed and arranged to operate substantially as described.

JOHN K. HALLOVELL. .Witnesses:

F. G. FAXON, CHAS. W. PILE. 

